December weather forecastSouth Milwaukee, WI
December
Weather in December
The first month of the winter, December, is still a cold month in South Milwaukee, Wisconsin, with temperature in the range of an average low of 25.3°F (-3.7°C) and an average high of 33.3°F (0.7°C).Temperature
As December arrives, South Milwaukee's weather displays a decrease in high-temperatures, transitioning from November's frosty 43.9°F (6.6°C) to a cold 33.3°F (0.7°C). South Milwaukee's December nights witness minimal differential from the daytime temperatures, with averages of 25.3°F (-3.7°C).Humidity
In South Milwaukee, the average relative humidity in December is 81%.Rainfall
In December, in South Milwaukee, the rain falls for 7 days. Throughout December, 0.79" (20mm) of precipitation is accumulated. In South Milwaukee, during the entire year, the rain falls for 131.9 days and collects up to 18.54" (471mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In South Milwaukee, in December, snow falls for 9.5 days, with typically accumulated 1.14" (29mm) of snow. Throughout the year, there are 45.2 snowfall days, and 7.83" (199mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:03 am and sunset at 4:18 pm. On the last day of December, sunrise is at 7:22 am and sunset at 4:27 pm CST.
Sunshine
In South Milwaukee, the average sunshine in December is 3.9h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 1 translates into these guidelines:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
South Milwaukee, WI
- Average high temperature in December: 33.3°F
The warmest month (with the highest average high temperature) is July (75.9°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in December: 25.3°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in December
South Milwaukee, WI
- Average pressure in December: 30.08"Hg
The months with the highest atmospheric pressure are January, February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
South Milwaukee, WI
- Average wind speed in December: 11.8mph
The windiest month (with the highest average wind speed) is January (12.6mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).
Average humidity in December
South Milwaukee, WI
- Average humidity in December: 81%
The month with the highest relative humidity is January (84%).
The months with the lowest relative humidity are October and November (75%).
Average rainfall in December
South Milwaukee, WI
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is July (2.4").
The driest month (with the least rainfall) is February (0.75").
Average rainfall days in December
South Milwaukee, WI
- Average rainfall days in December: 7 days
The month with the highest number of rainy days is July (16.1 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in December
South Milwaukee, WI
- Average snowfall in December: 1.14"
The month with the highest snowfall is January (2.01").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
South Milwaukee, WI
- Average snowfall days in December: 9.5 days
The month with the highest number of snowfall days is January (13.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
South Milwaukee, WI
- Average daylight in December: 9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 3h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
South Milwaukee, WI
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is July (11.6 days).
Average UV index in December
South Milwaukee, WI
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
South Milwaukee, WI
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in December
South Milwaukee, WI
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
